Coupler and lock



M my Wm. G. T. $00M mw wm COUPLER AND LOO-K Filed July 7, 1.9% 2Sheets-Sham 1 D m air 5 [iilllllil INVENTOR.

GEORGE T Coo/ 5.

A TTORN m mm mm @A .R T m .P C

Filed July '7, 1934 INVENTOR.

I GEORGE T Coo/ 5. wm

hullhhtllhll enwre fieeree l, tleelr enwn he 1 to erleen Will when 9lit. 111

houth Nerwnlh, henna, n eotlun not It Went V wl lnventlon relates tocoupllnge, ot the net 'uenerell with hoee; enrl and eeneelr to ooupllngefor one with lwey t w tenor, anal/or eh i the um therete er lrone ee theether.

Htolore there have lwtor loo the y I ot oouple Host or. these pro,- them of not -1 verr tleel tor nay-la m -out w. J a lon e1 tlmeamdlnallklndeott to which-articles 0! this time are subject.

etlve to the other.

er nom nee tn 1: r In toefleet the etlve, by In not the look by r the wewan. n the mm re ne m of the plunger l r pose rate which, however, theennteee ol loose wlth the vlhmtlone t ur in the l ot flhllllpmhllt withwhleh these eounllngs ere. w ln eoe ot the other proposals e. rerworltleel hllmeltlt en el themetine ports. wee neoeseerw ln net?- torender the loch eheetlre, end eome reuulreel eneolel enre to retreet theloelglngfmemhers helure the meln coupling heuele-eoulrl he nut tonether.l

lt le en ohleot or the present lnventlon to prev rlole erple enollnenpenslve eonnler loch whleh wtll he nosltlve entl eheetlve toreontlnuoue use over at long perloel of time nnel threh ell hlntle oreendlltilons.

l It in nnother, ohjeot ol the Loreeent lnventlon to nrovlele n leekwlueh wlll not require new erltlenl ellgnt between the eounllne nertehe- 3 lere it can he moved into loelnne posltlon, end.

which can he easily and quickly moved from the leelnne or operativenosltlon into an lnonerntlve pesltlhll,

lt is e further object of the present invention to k provide/e counlmgwhich will he are nearly leeln proof es possible. V 5 A still furtherobject or the present inventlon "is to provide e 'coupltng which may hethoroughly loeheelln the'finel connected position, unrl whleh willremain locked rlurlne the many vihretlons and the swinging movements ortherlerlees with he whleh alt may he need].a

rerloue e mew he eer eoeehes end height to eteem.

nebmeotlnoluoollrj.

eltugh, in to pt t lnvention it ill the}: th

equally well end r 4 y f 4- on o d w,

pt lnvenhen provider u number of novel in relation to improved eouplersone L um therel'or, ln a novel hleh tr putatively o in order toneeulatlon ot th lte l eorere tor the rural or the w: e, or to heperivmn ll relntlve to the how; end n novel olmnnel tor e we 1.: memherWanted to loeetejrllreet, ml hole the memher tn ttetrel toward enel fromhoth lte operative enel lhonerntlre nontlene,

n nher of neldltlonel leetures are provldlezl hr the present inventionlncluellng: unusuel es or leelnne memhere which in one term is enpnnslhle to erlp e smell number ol ports and thereby he held inretreated position, end which gripe n lereer numher or parts in theeelvencedl Vnoeltlon to more firmly rein in this manor-tent noeltlon;which hestthe eolventeee oi proviollne e nlurnlity of wedge lookingpoints on the sides ol? the memher and et the point where it perlo an.the meln holding function; which, through en inherent resilientehereoterlstlo dispenses with the neeesslty or usual coll snring'einolcoll egerlne seehets that accumulate wnter and rust; and which hasnovel, integral structures eolepteol to limit its travel into bothoperative enol luoperetlve positions. In another form the loelrlnemember is emenslble to lrictlonnlly remeln in both entranced meretrneted position.

An individual lenture of the present invention ls the provision or ncoupler "with e, cotter look, in which the cotter is automaticallyopenerl or serenelas it isdriven into the operetlre position. Anotherfeature is the provlelon of n coupler loel: medium which may be readilyollsussemhlerl in order to replnee worn parts, and which may he eeellynnel utuelrlwneeemhleol to the eenerel or till Ensign coupling parts ofcouplers already in the A further individual feature of the presentinvention is the provision of a novel lock adapted to wedge upon androtate mating coupling heads, one relative to the other in order to movethem fully' into closed position about a regular connection, and whichhas the novel advantage of each providing a double locking contact tominimize the vibration and to minimize the danger of mov-' ing themember into a retracted position.

In the drawings Figure 1 is a top plan view of the complete coupler withthe present invention applied thereto.

Fig. 2 is a side view of the complete coupler in the closed and lockedposition, with the open position shown by dot and dash lines. 1

Fig. 3 is a top view of just one coupling head with the locking deviceof the present invention in the retracted position.

Fig. 4 is an end view of the coupling with a fragmentary sectionalshowing of the locking devices of the present invention in operativeposition. 7

Fig. 5 is a perspective view of the locking member.

Fig. 6 is a perspective view of one form of cover plate provided by-thepresent invention.

Fig. 7 is a top plan View of a modified form of the present invention.

Fig. 8 is a fragmentary sectional view taken on I line 8--8 in Fig. 7.

Fig. 9 is a perspective view of the modified form of locking member.

Fig. 10 is a perspective view of the cover plate illustrated with thatform of the invention shown in Fig. 7.

Fig. 11 is a perspective detail of a modified form of locking unit. I

The present preferred embodiment of this invention illustrated in Figs.1 through 6 comprises a coupling l5 including counter-part coupling Iheads i6 and I6 each having a main body section H with an integral borel8 having a screw thread connection l9 at one end for receiving a pipe20, while the opposite end of the bore is provided with a gasket 2| heldagainst a chamfered wall 22 by spring clips 23. Although a threadconnection IS in a solid pipe 20 is shown, it should necting lugs 21 onthe sides of the main body l-i in such manner that there is a smallspace be- -xtweenthe gaskets 2| when the two heads are pivotallyseparated as indicated by dot and dash lines in Fig.2 and move the headslongitudinally toward each other to insure a substantially tightconnection between the two gaskets as the heads are movedrelative toeachother from said dot and dash position shown-in Fig. 2 into the fullyconnected position shown by solid lines.

In the general 'uses of couplings. especially on.

railways, it h asbeen found extremely desirable to. provide means tolock mating coupling heads together 'in order to prevent them frombecoming nected relative to each other.

disconnected, or from becoming loosened relative to each othersufficiently to adversely permit the escape of steam, vapor, air, or thelike. This is very important, since the escaping steam, or the likebetween passenger cars annoys and sometimes scares people getting intoand out of the cars, and lowers the efliciency of the engine in its mainduty of pulling, as well as rendering the individual car devices towhich they are associated less effective. I

Because the couplings are between passenger cars in close places there.is danger of steam moisture settling .on the platform or-steps andfreezing with many attendant dangers. In this close place between carsthe trainman may be burned by steam if the joint is not tight, or if hemust pull back locking members or otherwise manipulate the couplingheads. These dangers are overcome advantageously by the safer. couplingprovided by the present invention, since the locking members areyieldingly held in retracted and advanced position and tighten the mainconnection between coupling heads.

Now, it should be particularly noted, that the present inventionprovides a novel and highly eflicient lock which absolutely prevents thecoupling heads from loosening or becoming discon- In the now preferredform, illustrated in Figs. 1 through 6, the present invention provides ahousing 28 including a pair of front lugs 29 and a pair of rear lugs 30having recesses 3| and 32 respectively for the reception and retentionof a cover plate 33, the purpose of the latter being described shortly.The lugs 29 and 30 are preferably made integral with the main body I!for economy in manufacturing costs. Other cooperating lugs 34 and awedge 35 are also made integral with the main body but are spacedrelative to the lugs 30 and 29 in a manner to provide a channel 36 and38 capable of receiving a novel form of an expansible sliding member 31in a. manner to limit its sliding movement in the channel in twodirections.

After the key it is placed in the channels as and 38 the cover plate 33is placed thereover with the notches 46 just clearing the lugs 30 andthen by sliding the cover in the direction of the arrow a" (see Fig. 3)the plate moves into the slots 3| and 32 into the full operativeposition shown in Fig. 1, whereupon a screw 41 may be passed through ahole 48 in the plate and secured in a threaded hole 48 in the wedge lug36.

The sliding member 31 in thispresent preferred form is somewhat in theshape of a cotter,

but is preferably made of substantially flat strip stock instead of thecustomary semi-circular material. Recesses 39 are provided in the sidewalls 10 of the member, these recesses being adapted to clear the points34' of the lugs 3 when the sliding member is pressed in the channel 38,and are of sufficient length to limit movement of the member in adirection toward the operative position shown in Fig. 1, and to limitretracted movement thereof to shown in Fig. 3. i

the inoperative position retracted movement is further limited by stoplugs ll on the member 31 adapted to engage the front edge 42 of thecoverplate 33. Each key is provided with a set of fingers lid and libhaving a V-notch 43 therebetween, and having a slight bevel 44 on theunderside thereof. The V-notch 43 is more acute than the shape of thewedge 35 so that the inner walls of the fingers I [a and lib grip thewedge and so that" thewedge til) expands or spreads these fingers as thesliding member is moved from the retracted position shown in Fig. 3 tothe advanced position shown in Fig. l. The recesses it in the memberill, in

1 addition to limiting travel thereof, make it more fiexible tofacilitate the action oi the wedge it spreading the fingers ila andtlb.

Now it should be particularly noted that as the fingers did and ilb arespread between wedge ill there is a movement oi the walls oi the recessit toward the points it into bighting engagement so that these pointsill grip the fiexed member and prevent its retraction.

As the sliding member ill is driven irom the retracted position shown inFig. 3 toward the adjacent connecting arm it, by striking it with ahammer or the like in the direction oi the arrow a shown in Fig. i, sothat the bevel it engages a cooperating bevel ii on the arm and eiiectsa similar pivotal movement oi the heads it rela tive to each other inorder to tightly bring the gaskets il iace to face, and in its finalmovement wedges between these two gaskets tightly together since thecover plate prevents it irom moving upwardly and away irom the mainbody'll' .Thus, there is a quadruple lock efiected when the slidingmember is moved into this, the op erative position; viz., between thepoint i l and bottom wall oi the recesses ii; between the fingers didand llb engaging the wedge it; between the member and the cover plate asthe bevel id rides up'in the bevel ii; and between outer side walls oithe fingers lla and lllb engaging the points ill oi the lugs it. Tofacilitate the latter, the wedge it is provided with a bevel it, bestseen in Fig. 11 whichallows the outer iree ends of these fingers to movetoward each other and also permit greater variations in the thickness oithe fingers than would be possible without the space provided by thebevel it".

Movement oi the member ill forwardly into the operative position isusually stopped by the bevel riding up on the connecting arm bevel llll.However, the point it engaging the end oi the recess ii, as it nearlydoes in Fig. i, also serves this purpose. As the expansible slidingmember is moved toward the operative position the wedge moves deeperinto the member and tends to both move the bottom walls oi the recesstighter against the points i l and spread the fingers did and llbtighteragainst the points ill oi the lugs it. Thus, the sliding memberis more securely held in the important operative position than it is inthe inoperative position. The two fingers Alla and llb engaging thebevel till minimize the possibility oi vibrations adversely looseningthe slide ill and in efiect iorm a desirable double look at the heavyload point.

In order to open the lock and coupling again it is merely necessary tostrike the member i'l as still whereupon the bevels d ll slideoii" theconnecting arm bevels it and back until the lugs ll engage the plate id,or the points it engage the ends oi the recesses ill to limit movementof the .ember into retracted position. The v notch and wedge itirictionally hold member il retracted.

In passing it should be noted that the arm the associated connectinglugs it, it, and ii. and the bevel iii are substantially similar to thatin use currently on most railways, but with a differ ent'type lock, sothat the coupling head lb or it with the advantageous lock oi thepresent invention may be put into use without changing over an entirerailway system since one oi the ried thereby are brought into iace toiace concoupl heads oi the present invention will fit and properly lockexisting coupler heads with other io oi locks.

in Fig. i there is shown a modified form oi the present invention whichincludes a coupling ii oi the so called transverse port type rather thanthe longitudinal or axial type illustrated with the first iorm oitheinvention. However. it should be understood it the novel locksprovided-by the present'invention are equally applicable with. bothtransverse and longitudinal types oi couplings. This modified i'orm oithe invention includes ting coupling heads to and lit, which are acounter -part oi each other. and have connections ill to any desirablemedium. These heads each have a main body it with an integral bore iiand with ends it, supporting gaskets tl oiany oi the now well knowntypes. These heads it and it and the gaskets ti cartact with aconnection similar to the connections it, it, and ill oi the first iormoi the invention, or any of the other connecting mediums now well knownin this art. A housing it is provided on each oi the main bodies it, andin its present preierred iorm comprises a set oi iront lugs ill and rearlugs til having external recesses ti and ti respectively, and havingintermediatelug ill.

This housing supports a substantiallysolid U- shaped sliding member ithaving a shank it and fingers ll and ll, rather than the substantiallyexpansible member i'loi the first form or the invention. This slidingmember is provided with a Ll-shaped cut-out ii adapted to just. clearthe intermediate lug it. and the adjacent walls or" the lugs t l form achannel it to direct and support the Ill-shaped fingers ll and ll. whileat the same time, the inside walls of the lugs ii form a complementarychannel it adapted to receive and guide the shank id oi the member ii inits travel.

A bottom wall it oi lJ-shaped slot it engages the intermediate lug ii tolimit'movement oi the key toward its operative position, and shouldersit at the point where the fingers ll and ill and shank ill meet y engagethe ad acent walls oithe lugs lii'to limit movement of the member intothe retracted or inoperative position. Aux liary lugs ii on the tops ofthe fingers ill and ll also serve to limit the retracting movement oithe sliding member it by engagin with the iront edge lli oi a modifiediorm oi cover plate 'll'll. 4 This modified iorm oi cover plate ll isprovided with dovmted and curled-in ears ii and ii adapted toslide intorecesses it and li oi the lugs and iii, and is provided with smallfingers ill and ill adapted to be knocked down after the cover has. beenslid into the recesses into a plane below the recesses and into aposition to engage the sides or the lugs fi l and iii respectivelyrather than to'slide through. thereby locking the cover plate in place.The shank has a slot lilo to yieldingly grip the channel din.. Thus, theyielding shank oi this form oi sliding member it by its integralyielding structure. like the sliding member dl oi the first iorm oi theinvention, is yieldingly maintained in retracted or advanced position.This ieature makes ior a 70 ill ill)

The intermediate lug it of the shank 10 to drive the sliding member 69forwardly in the channel 36' and 38 until bevels 82 on the undersidethereof, engaging and riding over cooperating bevels 83 on connectingarms I 84 of the heads 56 and 56', tend to cam the two heads together,to lock them in the connected condition.

In order to unlock the coupling it is merely necessary to stirke themember 69 at the forward end of the fingers H or H or upon the lugs 75,whereupon the bevel 82 rides off the bevel 83 and the member 69 is movedback to the retracted position with the walls 14 thereof engaging thelugs 64. In this retracted position the fingers are entirely clear ofthe projecting arm 84 so that the two coupler heads may be rotated anddisconnected relative to each other.

A Thus it will be seen that the present invention provides a couplerwhich may be very tight, and thereby prevent the leakage of air, vapor,steam, or the like for economy, increased efiiciency, and forconvenience which has the advantage of thoroughly locking matingcoupling heads relative to each other with a minimum of effort.

In some instances it may be found desirable to replace current typelocks on couplings already in use with the improved lock of the presentinvention. To this end the present invention provides a modification inwhich the lock may be made as a unit 90 with a base 9| adapted to besecured to a planed off section of a regular coupler as by screwsthrough holes 92, by welding, or by cover plate holding screws 81passing through the base 9| and threading into suitable tapped holes inthe coupler head.

This unit may be an exact counter-part of that form of the inventiondescribed in detail hereinbefore so far as the lugs, channels, slidingmembers, cover plates are concerned, excepting for the added provisionof an underlying plate similar to the plate 9! of the base 9| shown inFig. 11

and fastened to the coupler heads in the same manner as the latter.as'will be readily understood by anyone familiar with this art.

As shown, the unit 90 in Fig. 11 is a counterpart of the first form ofthe invention. The same sliding member 31 and wedge 35 are used. Thesame lugs 29, 30, 34, and 34' are used, but in this form the lugs aresupported by the plate 9| rather than made integral with the couplerhead, and are of shorter height and flattened rather than recessed atthe top to provide a fiat support for plain cover plate 85 -having holes86 to receive holding screws 81 which may be threaded into tapped holes88.

Although a sliding member 31 or 69 is provided on each coupling head, itwill be understood that only one alone on a pair of mating couplingheads forms an effective lock.

Also, though several bighting or gripping points are illustrated anddescribed in connection with the first and third forms of the invention,it is not necessary to use all of these in the one coupling, and eventhough two bevels are illustrated and described where the real lockingtakes place, it will be readily understood by those skilled in the artthat one bevel rather than two, or in some cases no bevel at all, willalso serve, dependent upon particular requirements of the individualcoupler.

If preferred, the lugs 29, 30, 34, and 34 may be in the form of pinsinserted into the coupling head, as will be understood readily by anyoneskilled in the art. However, for economy, they are cast integraltherewith.

Other modifications may be made within the scope of this invention, andportions of the improvements may be used without others.

I claim:

1. A coupling head comprising a body having a main connection and aprojecting arm, adapted to beconnected to a mating coupling head with aprojecting arm; and a one-piece reciprocating and expanding lockingmember on said head having retracted and advanced positions, adapted tooverlie the projecting arm on the mating head and lock the headsrelative to each other.

2. A coupling head comprising a body having a main connection adapted toreceive a mating coupling head; a housing on said body having a channel;and a one-piece expansible sliding member confined for reciprocatorymovement in the channel of said housing, and adapted to be moved overthe mating coupling head.

3. A coupling head comprising a body adapted 4. A coupling headcomprising a body adapted to receive a mating coupling head; a housingon said body; an expansible sliding member in said housing; side wallson said sliding member; a set of lugs in said housing adjacent the sidewalls of the expansible sliding member; and a wedge adapted to spreadsaid expansible sliding member and to move the side walls thereof intobighting engagement with the lugs in its movement from a retractedposition into an advanced operative position relative to the matingcoupling head.

5. A coupling head comprising a body adapted to receive a matingcoupling head; a housing on said body; an expansible sliding member insaid housing; a set of lugs in said housing adjacent the side walls ofthe expansible sliding member; a second set of lugs in said housing; anda wedge adapted to spread said expansible slide and to move the sidewalls thereof into bighting engagement with both the first and secondset of lugs in its movement from a retracted position into an advancedoperative position relative to the mating coupling head.

6. A coupling head comprising a body adapted to receive a matingcoupling head; a housing on said body; an expansible member in saidhousing, having recessed side walls; a set of lugs extending into saidrecessed side walls and adapted to limit movement of said expansiblemember into retracted and/or advanced positions relative to the matingcoupling head.

7. A coupling head comprising a body having a main connection adapted toreceive a mating coupling head; a housing on said body; an expansiblesliding member in said housing having advanced and retracted positions;and lugs on e eerreee rep; em'i e eerer mere fer the ehemei er seerlirerreine redeemed ice eieee the epezr rep.

ii eemaiimeleeed. eempmrinr e, beer seemed re reeerre e marine" emmfimeheed; housing in mid randy her ing recesses; 2r ene-pieee expensible endreeiproeetery sliding member in said housing merited to lock thecoupling heads relative to each ether; and e cover plate for saidhousing ardepred re engage with the recesses ize hold the fi mi memberin the bee.

- M. A coupling heed comprising e. body adepteri w receive e matingeeupiing heed; a. housing we said body hearing reeesses; e are piece emrremeible are reei eroeetery sliding; member in raid lee-using: edemedice lack; the warming needs rehrtive w eeeh ether; raver were for saidmetering errepted engage with said recesses; r single serew engagingwith said never were we. edepised, with eeicr recesses, mm

1 eever were eeermsi; movement, in all siiree time r1. e emrplmg Dee/ecomprising a bare; were receive a, mature mummy; heed; e1 musing semeste-21m? brewing; reeeseee; eiidine member. in said housing eciejrted. iaemer. fibre C4111 needs reletive te eeeh ether; er eeverpmte sliding;lure the recesses or we heesimr; enc'k eere err seed eerer rile-t eeeepted re eeeperere with Hare merrier to held; the eever were in thereeereee er? Amusing.

in e. member; she eememetimr 0:? e pair er marine: eeurrimr heads; aremain eeneeetien be= rween see eeurrlirxg needs; e pmjeermsr arm en Aerreh er said heads; end are eee-pieee reriliemt err end, reeipreeememember an et Eesst one ef seed heads ezdepteci re everririertheprojecting arm er the ether. heed, rreldelrle letereily end notvertieeilr reirrive re rhe projecting arm re luck the mere eemeerienreed be leek the he reiae re rive re eeeis ethero 1 13 in e eeuplmrr theeembirrerien er e pair eii' warming he; 2% meme ecmrreetion betweensaid. eeirpimr 1r, are pieee EWSH ierrtv end reeipreeeme member er; erreer rem beveled end en eerie) member; an; beveled were; err themetmeemrprmrr heed eeemt the reemenr sliding member and, eflepteci rewere erzrize with flee beveled end er the sliding meme m mere the hemerelieeive me e ether re, m r! eemelirrr the eembmetmn er e weir ereemmmrrr heads; a eonneeriken between emu? eerrmme herds; e uniteryeneqpreee erpensihle end. reeizrreeeme ermine member errant-ed w lockthe Breeds reizrfizire re each other while in. its. er-

eemered eomiiitreir; email are en the ewe rer eumrertinr we eiidmrmember In re eouplirrr the eembinermn of fi9lpair eiif eerrrlimrmembers; err eeeemrie redefine eerr rreeieem eetweerr sem members; eprejecrinr erm er; eeeh er rem heme; end e one piece expemsimeelldimememtaerem ene er eerie; heads :arflepi'ed to reeipreee-re we;everrrele the projecting e or the ether member m eperete the w: meetierlend to leer; the; rreedr relrmve eereh emere 1 rec m e ee mine he theeememetien er e rr we release reeirrreerble rend erreesrele-siidlmrmemeer; herring edepred to; leeete and sup I beer, rrrerr ereeeire Q5mermr eeuplmr her TF5, e eeeriirnr heed the eemhmerierr er berry.r'werrted to; receive e marine seeming heed; e subrtentmirr solid.sliding member having e reeess and e eheulder; e, harming adapted. toE0- eerie and support the substantially eerie ending member; and lugs insaid housing efiepted er engage seicr eheulder end the-harem; ef seed rcess of the, sliding member re limit; its mave meet mm advanced andretracted pesioians reli ative ta the mating coupling heed.

18. A locking unit fer a ceupline heed eerie prising; e. heusirig havinga, channel; e waiterr expansible slide in. said channel; meens rerholding said errensihle slide in bath a, retreefieel end em. eeveneeairesitie end 5% bese in eeiei unit fer eenneetier if; to e coupling freei0 we In e, eeuplirrrr hearithe cemieinetrerr er eodr edepteci toreceive a ma tim eeuplme heed; e solid. Swims; member Ermine e Web-erredre eess mcweele in two direetiens; e homing; eflepted te reeeive thesolid sliding member; me in. said musing adapted be engee'e the free51am at said recess w limit movement mi" rile member in one direetion;and hers er. the sliding member edepteri re limit its meremem in. theother eiireetieen 20. 1121 a. eeuplirre heed. the eembinzetierr suede;adapted m receive 9, marine campfire; heed; e. Ieeusiee en said Randy;ereeipreeeting sliding;

member in. said heusing having retreeiecr end;

edvenceei pesitiem relative to the meeting emrpiimg heed; remi mregrelresilient means.- em the siide rer resiliently fielding rem siiele whomthe re= treated. em? time edveneed pesirrorr,

2L A emmllme heed eemprisine e nodr fear fine e mam eenneetien endprejeeting arm, adapted, be he enumerated igo e, martin emrplmr headwith r; pmjeetiue erm; rr reeiproeetme sliding memberen er Ieeer: (me erseine end herring eeimmeeri end refireeted pesiricms reietive rethepreieetmr rem 911 we meeting heed; and integral seetiene on me slidingmember and forming pert mere-e1 ea eeeperete with the heed uecm Whierrthe ending member is mounted erred m hold the member in its re treatedpesirierr err-de eted m be eemrected. to e mating eerrplmg he with eprojeetinr am; e, reeipreeeele slid- 2mg member on em, reest one or seedheads semi hey edremced en retrsrctesi pesitiene rem. tire to theprejeetinr rrrm are the meeting and em integral yielding. section an thesliding;

" member erred ermine apart: thereef warmed. re

eoeperete with. me heed upon vrmerr the sliding member is mmmted end to:hold rhe reeirmreerrble ermine member in its rerrrctee pesrtierrc re, Aeeupliee herd comprising beer new we e.v we :1: eenneeiren edewyei'sed wreeeire a wer inr eeuelinr heed; e; ene-=pieee merrier? memberreeiprecarble in eerie Trudy ergedepted re he moved ever the mereeuplrnrheed; errcl: seeder. em t-ire ene eieee re 'ciprocable locking membercooperating with the body to hold the sliding member in a retractedposition.

25. A coupling head comprising a body having a main connection and aprojecting arm,

adapted to be connected to-a mating coupling as it is moved from one tothe other of said positions. u

26. A coupling head comprising a body hav- 1118 a main connection and a.projecting arm, adapted to be connected to a mating coupling head with aprojecting arm; 8.!3116-121806 recip roosting and expanding lockingmember on said head having retracted and advanced positions, adapted tooverlie the projecting arm on the mating head and lock the headsrelative to each other; and means is moved. g

GEORGE I; COQKE.

for looking said member as it-

